What is the historical overview of Hanzhong, Shaanxi? Great gods, help!

Hanzhong, located in the southwest of Shaanxi Province, borders Qinling Mountain and Nanping Bashan Mountain in the north, with the beautiful and rich Hanzhong Basin in the middle. The city governs ten counties and one district, with a total area of 27,000 square kilometers and a population of 3.72 million. Hanzhong is a national historical and cultural city and a national ecological demonstration construction pilot area. Hanzhong has rich cultural heritage and unique and beautiful natural scenery. There are 1 13 cultural relics protection units at all levels in the city, including 2 national key cultural relics protection units and 25 provincial key cultural relics protection units. There are 1 biosphere between man and nature, 7 national ecological scenic spots (spots) and 16 provincial-level ones in the world. Hanzhong is the best ecological place in the same latitude on the earth. This beautiful basin is surrounded by the towering Qinling Mountains and the vast Bashan Mountains, and is nourished by the Hanjiang River and Jialing River, two tributaries of the Yangtze River. Although it is located in the west of China, it has the same beautiful scenery as the south of the Yangtze River. It is a treasure trove of geomantic omen that combines the benefits of the north and the south and the beauty of the north and the south. When you travel in Hanzhong, you will find green everywhere. Foping Nature Reserve is the first "World Man and Nature Biosphere" awarded by UNESCO in northwest China, and the first research base of wild giant panda breeding in China. Evergreen Nature Reserve has the reputation of "biological resource pool", and there are many kinds of rare animals and plants, especially the four national treasures-crested ibis, giant panda, golden monkey and takin, which have attracted wide attention from scientific circles at home and abroad. Liping National Forest Park is known as "Jiuzhaigou" in the northwest, with many strange peaks, rocks and beautiful waterfalls. Baizi Mountain is towering into the sky, with 92 peaks, 82 temples and 72 caves. It is picturesque and foggy, and its alpine meadows and Bai Zi sinkholes are rare in the world. Wuzi Mountain is steep and densely forested, and is known as the "Upper Huashan Mountain" in southern Shaanxi. More than 2,500 acres of rare white pine in the mountains are spectacular. The Gaoxia Pinghu in Baogukou Shimen Scenic Area is graceful and graceful, imitating the Shimen plank road built by mountains and rivers, flying in the air, reappearing the grand style and shape characteristics of the plank road in Qin and Han Dynasties; Hongsi Lake is a "natural scroll of Chinese painting", which is shrouded in clouds, blended with mountains and rivers, quiet and mysterious. Nanhu Lake is a beautiful water garden with beautiful natural scenery, surrounded by bamboo forests and winding paths. The largest dry orange production base in northwest China-Chenggu 100,000 mu dry garden, with orange red and yellow in autumn, is pleasant to pick oranges in the garden; Xixiang Cherry Valley, the second largest cherry base in China, is in full bloom, with beautiful mountains and fragrant Wan Li. There are also millions of acres of rapeseed and 500,000 acres of tea gardens. Every spring, there are hundreds of miles of golden flowers on both sides of the river, and bees and butterflies are flying, which is refreshing. In recent years, the tourism industry in Hanzhong has developed rapidly, and the six elements of tourism are complete. At present, there are more than 50 high-end hotels, 16 travel agencies, more than 50 mature scenic spots and nearly 50,000 tourism professionals in the city. Urban information transportation is developed, mobile phones reach scenic spots, and civil aviation, railways and highways reach all parts of the country. We have also launched more than 50 routes, including Hanzhong Calligraphy Tour, Three Kingdoms Heritage Tour, Tianhan Ancient Tour, Rare Wild Animals Watching and Scientific Research Tour, Summer Leisure Tour and Jialing River Drifting. Hanzhong hosts a variety of tourism and cultural festivals every year, such as the Qingming Cultural Tourism Festival of Wuhou Tomb, the Sean Temple Tourism Festival, the Southern Shaanxi Folk Song Festival, the Zhang Qian Tourism Culture and Art Festival, the Tea Festival, the Cherry Blossom Festival, the Citrus Festival and the Lotus Festival.